This cartridge-type roller ball liquid ink pen refills with international short Kaweco ink cartridges, just like a fountain pen! It's a convenient ink system that gives you the smooth flow and color range of fountain pens in a roller ball pen form. The Kaweco Sport Ice Roller ball pen is available in four translucent colors and is made from strong yet lightweight ABS/Terlux plastic.
Pen dimensions: Approximately 4.1 inches (10.5 cm) long closed, 5.1 inches (13 cm) with cap posted x 0.4 inches (10.8 mm) body diameter. Cap diameter: Approximately 0.5 inches (14.2 mm).
The video below shows how to install an ink cartridge in your Kaweco pen:
This is a fun pen, and the idea behind it is great. However: As another reviewer
noted, it does tend to skip; in my case, this may be due to my almost-exclusive
use of fountain pens (i.e., I have trouble with the more-vertical orientation
required for ball pens, generally.). Also, the Kaweco Sport ink converter DOES
NOT FIT, so, unless you're willing to refill international shorts with an
eyedropper or grease up the threads to try a conversion, you'll not be able to
use bottled ink. I've not had / used it long enough to say anything about life
expectancy for the ball / 'nib' assembly just yet. I won't be using it every
day, but I'm glad to add one to my collection.
Bought this as a gift for someone who uses rollerballs, after having good
experiences with the Sport fountain pens. I got to try it myself & find that,
for smoothness, it can keep up with quality pens of either type. It seems to be
getting hard to find affordable ballpoints that take cartridges, so this is a
great way to give someone who's used to "normal" pens the opportunity to play
with unusual ink colours. My only small criticism is that the inside of the cap
has an insert of cloudy plastic (which is hard to see in the product photo)
which makes it look a bit cheap compared to rest of the clear body: next time
I'd probably go with black.